bitbake: bitbake: tests/data: add tests for variable flags

Check default flags are correctly returned by getVarFlags and check all flags
are returned when internalflags is True.

Check delVarFlags also removes default value.

Check all flags are removed after delVar.

Run the test with:
    $ bitbake-selftest -v bb.tests.data.TestFlags
    test_delflag (bb.tests.data.TestFlags.test_delflag) ... ok
    test_delvar (bb.tests.data.TestFlags.test_delvar) ... ok
    test_setflag (bb.tests.data.TestFlags.test_setflag) ... ok

    ----------------------------------------------------------------------
    Ran 3 tests in 0.000s

    OK

This is a test case for [YOCTO #15685]

(Bitbake rev: ff8cae735cf489373af1aac7ee233d7b82d483d3)

Signed-off-by: Louis Rannou <louis.rannou@non.se.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/tests/data.py

@@ -450,17 +450,64 @@ class TestFlags(unittest.TestCase):
         self.d = bb.data.init()
         self.d.setVar("foo", "value of foo")
         self.d.setVarFlag("foo", "flag1", "value of flag1")
+        self.d.setVarFlag("foo", "_defaultval_flag_flag1", "default of flag1")
         self.d.setVarFlag("foo", "flag2", "value of flag2")
+        self.d.setVarFlag("foo", "_defaultval_flag_flag2", "default of flag2")
+        self.d.setVarFlag("foo", "flag3", "value of flag3")
+        self.d.setVarFlag("foo", "_defaultval_flag_flagnovalue", "default of flagnovalue")
 
     def test_setflag(self):
         self.assertEqual(self.d.getVarFlag("foo", "flag1", False), "value of flag1")
         self.assertEqual(self.d.getVarFlag("foo", "flag2", False), "value of flag2")
+        self.assertDictEqual(
+            self.d.getVarFlags("foo"),
+            {
+                "flag1": "value of flag1",
+                "flag2": "value of flag2",
+                "flag3": "value of flag3",
+                "flagnovalue": "default of flagnovalue",
+            }
+        )
+        self.assertDictEqual(
+            self.d.getVarFlags("foo", internalflags=True),
+            {
+                "_content": "value of foo",
+                "flag1": "value of flag1",
+                "flag2": "value of flag2",
+                "flag3": "value of flag3",
+                "_defaultval_flag_flag1": "default of flag1",
+                "_defaultval_flag_flag2": "default of flag2",
+                "_defaultval_flag_flagnovalue": "default of flagnovalue",
+            }
+        )
 
     def test_delflag(self):
         self.d.delVarFlag("foo", "flag2")
+        self.d.delVarFlag("foo", "flag3")
         self.assertEqual(self.d.getVarFlag("foo", "flag1", False), "value of flag1")
         self.assertEqual(self.d.getVarFlag("foo", "flag2", False), None)
-
+        self.assertDictEqual(
+            self.d.getVarFlags("foo"),
+            {
+                "flag1": "value of flag1",
+                "flagnovalue": "default of flagnovalue",
+            }
+        )
+        self.assertDictEqual(
+            self.d.getVarFlags("foo", internalflags=True),
+            {
+                "_content": "value of foo",
+                "flag1": "value of flag1",
+                "_defaultval_flag_flag1": "default of flag1",
+                "_defaultval_flag_flagnovalue": "default of flagnovalue",
+            }
+        )
+
+    def test_delvar(self):
+        self.d.delVar("foo")
+        self.assertEqual(self.d.getVarFlag("foo", "flag1", False), None)
+        self.assertEqual(self.d.getVarFlag("foo", "flag2", False), None)
+        self.assertEqual(self.d.getVarFlags("foo", internalflags=True), None)
 
 class Contains(unittest.TestCase):
     def setUp(self):